The Château d'Eau is a nineteenth century water tower, near the cours Dillon, beside the Pont-Neuf, in Toulouse, France. The building and its pumping station have been listed as historical monuments since 28 September 1987.Le château d'eau, pôle photographique de Toulouse, also called Galerie du Château d'Eau, is a cultural institution dedicated to photography, founded in 1974 in Toulouse by the photographer Jean Dieuzaide.